The precision of skate bearings can be defined by the Abec standard with a scale of 1 to 9. The higher the number, the faster the bearings go, but without compromising on strength. Unfortunately, the shocks from the different tricks significantly weaken the ride, and immediately lead to its failure. This is why an Abec 7 bearing only has the advantage of rolling faster than the Abec 3, but in no way ensures better resistance to shocks. In all cases, to keep your bearings as long as possible, do not ride in water, avoid sand, and from time to time give them a cleaning with a rag and a drop of Speed Cream or oil. sewing machine.